Covering Ideals of Morphisms and Module Representations of the quiver $\mathbb{A}_2$

preprint2013arXivOpen access

Sufficient conditions for an ideal $\mathcal I$ in $R\Mod$ to be covering are proved. This allows to obtain an alternative proof of the existence of phantom covers of modules. Our approach is inspired by an extension of the standard deconstructibility techniques used in Approximation Theory.

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Covering Ideals of Morphisms and Module Representations of the quiver $\mathbb{A}_2$

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Covering Ideals of Morphisms and Module Representations of the quiver A2\mathbb{A}_2A2​

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Covering Ideals of Morphisms and Module Representations of the quiver $\mathbb{A}_2$